The Reliance Design development environment enables you to import tags and data structures from the Telves configuration environment in the CSV file format.

Communication between the driver and devices is based on the request–response principle. The driver is launched by Reliance's runtime software at visualization project startup.

Starting up the driver

The communication driver is a DLL loaded into memory by the Reliance 4 Driver Server program, which can be launched either as a Windows service at Windows startup or as a standard application at the start of a visualization project. Information required to make a connection with devices is read from the visualization project. After reading this information, communication to all connected devices is activated.

Reading data

Data is read periodically or based on a one-shot request of Reliance's runtime software. When reading periodically, the tag value is updated at a configured interval. One-shot reading is used for tag-controlled data reading. Communication packets are built dynamically according to data quantity requirements. Data writing is based on a one-shot request of the runtime software.

Supported communication functions

Read Current Values

Write Current Values

Read Device Time

Synchronize Device Time

Read Parameters

Write Parameters (gas composition)

Read Archive Data (binary, data, and daily archive)

ELCOR-2 and miniELCOR – gas-volume conversion devices

Elgas – Gas Composition component

The component allows reading, editing, and writing gas composition parameters into a device.

Elgas – Gas Composition

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Reliance SCADA/HMI system

Reliance is a professional SCADA/HMI system designed for the monitoring andcontrol of industrial processes and for building automation. The resulting visualization can be easily displayed on a PC, Web, tablet, or smartphone.